1 | /** |
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2 | * @file |
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3 | * |
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4 | * @ingroup ClassicPartImpl |
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5 | * |
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6 | * @brief Classic Partition Manager Implementation |
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7 | */ |
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8 | |
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9 | /* COPYRIGHT (c) 1989-2008. |
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10 | * On-Line Applications Research Corporation (OAR). |
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11 | * |
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12 | * The license and distribution terms for this file may be |
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13 | * found in the file LICENSE in this distribution or at |
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14 | * http://www.rtems.org/license/LICENSE. |
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15 | */ |
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16 | |
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17 | #ifndef _RTEMS_RTEMS_PARTIMPL_H |
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18 | #define _RTEMS_RTEMS_PARTIMPL_H |
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19 | |
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20 | #include <rtems/rtems/part.h> |
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21 | #include <rtems/score/chainimpl.h> |
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22 | #include <rtems/score/objectimpl.h> |
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23 | |
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24 | #ifdef __cplusplus |
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25 | extern "C" { |
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26 | #endif |
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27 | |
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28 | /** |
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29 | * @defgroup ClassicPartImpl Classic Partition Manager Implementation |
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30 | * |
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31 | * @ingroup ClassicPart |
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32 | * |
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33 | * @{ |
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34 | */ |
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35 | |
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36 | /** |
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37 | * The following defines the information control block used to |
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38 | * manage this class of objects. |
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39 | */ |
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40 | extern Objects_Information _Partition_Information; |
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41 | |
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42 | /** |
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43 | * @brief Allocate a buffer from the_partition. |
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44 | * |
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45 | * This function attempts to allocate a buffer from the_partition. |
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46 | * If successful, it returns the address of the allocated buffer. |
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47 | * Otherwise, it returns NULL. |
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48 | */ |
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49 | RTEMS_INLINE_ROUTINE void *_Partition_Allocate_buffer ( |
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50 | Partition_Control *the_partition |
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51 | ) |
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52 | { |
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53 | return _Chain_Get_unprotected( &the_partition->Memory ); |
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54 | } |
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55 | |
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56 | /** |
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57 | * @brief Frees the_buffer to the_partition. |
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58 | * |
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59 | * This routine frees the_buffer to the_partition. |
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60 | */ |
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61 | RTEMS_INLINE_ROUTINE void _Partition_Free_buffer ( |
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62 | Partition_Control *the_partition, |
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63 | Chain_Node *the_buffer |
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64 | ) |
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65 | { |
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66 | _Chain_Append_unprotected( &the_partition->Memory, the_buffer ); |
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67 | } |
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68 | |
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69 | /** |
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70 | * @brief Checks whether is on a valid buffer boundary for the_partition. |
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71 | * |
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72 | * This function returns TRUE if the_buffer is on a valid buffer |
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73 | * boundary for the_partition, and FALSE otherwise. |
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74 | */ |
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75 | RTEMS_INLINE_ROUTINE bool _Partition_Is_buffer_on_boundary ( |
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76 | void *the_buffer, |
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77 | Partition_Control *the_partition |
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78 | ) |
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79 | { |
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80 | intptr_t offset; |
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81 | |
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82 | offset = _Addresses_Subtract( |
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83 | the_buffer, |
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84 | the_partition->starting_address |
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85 | ); |
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86 | |
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87 | return ((offset % the_partition->buffer_size) == 0); |
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88 | } |
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89 | |
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90 | /** |
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91 | * @brief Checks whether the_buffer is a valid buffer from the_partition. |
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92 | * |
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93 | * This function returns TRUE if the_buffer is a valid buffer from |
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94 | * the_partition, otherwise FALSE is returned. |
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95 | */ |
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96 | RTEMS_INLINE_ROUTINE bool _Partition_Is_buffer_valid ( |
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97 | Chain_Node *the_buffer, |
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98 | Partition_Control *the_partition |
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99 | ) |
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100 | { |
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101 | void *starting; |
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102 | void *ending; |
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103 | |
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104 | starting = the_partition->starting_address; |
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105 | ending = _Addresses_Add_offset( starting, the_partition->length ); |
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106 | |
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107 | return ( |
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108 | _Addresses_Is_in_range( the_buffer, starting, ending ) && |
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109 | _Partition_Is_buffer_on_boundary( the_buffer, the_partition ) |
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110 | ); |
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111 | } |
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112 | |
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113 | RTEMS_INLINE_ROUTINE bool _Partition_Is_buffer_size_aligned( |
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114 | uint32_t buffer_size |
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115 | ) |
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116 | { |
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117 | return (buffer_size % CPU_SIZEOF_POINTER) == 0; |
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118 | } |
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119 | |
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120 | RTEMS_INLINE_ROUTINE bool _Partition_Is_buffer_area_aligned( |
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121 | const void *starting_address |
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122 | ) |
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123 | { |
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124 | return (((uintptr_t) starting_address) % CPU_SIZEOF_POINTER) == 0; |
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125 | } |
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126 | |
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127 | /** |
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128 | * @brief Allocates a partition control block from the |
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129 | * inactive chain of free partition control blocks. |
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130 | * |
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131 | * This function allocates a partition control block from |
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132 | * the inactive chain of free partition control blocks. |
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133 | */ |
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134 | RTEMS_INLINE_ROUTINE Partition_Control *_Partition_Allocate ( void ) |
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135 | { |
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136 | return (Partition_Control *) _Objects_Allocate( &_Partition_Information ); |
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137 | } |
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138 | |
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139 | RTEMS_INLINE_ROUTINE void _Partition_Initialize( |
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140 | Partition_Control *the_partition, |
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141 | void *starting_address, |
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142 | uint32_t length, |
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143 | uint32_t buffer_size, |
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144 | rtems_attribute attribute_set |
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145 | ) |
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146 | { |
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147 | the_partition->starting_address = starting_address; |
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148 | the_partition->length = length; |
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149 | the_partition->buffer_size = buffer_size; |
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150 | the_partition->attribute_set = attribute_set; |
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151 | the_partition->number_of_used_blocks = 0; |
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152 | |
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153 | _Chain_Initialize( |
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154 | &the_partition->Memory, |
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155 | starting_address, |
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156 | length / buffer_size, |
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157 | buffer_size |
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158 | ); |
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159 | |
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160 | _ISR_lock_Initialize( &the_partition->Lock, "Partition" ); |
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161 | } |
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162 | |
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163 | RTEMS_INLINE_ROUTINE void _Partition_Destroy( |
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164 | Partition_Control *the_partition |
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165 | ) |
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166 | { |
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167 | _ISR_lock_Destroy( &the_partition->Lock ); |
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168 | } |
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169 | |
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170 | /** |
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171 | * @brief Frees a partition control block to the |
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172 | * inactive chain of free partition control blocks. |
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173 | * |
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174 | * This routine frees a partition control block to the |
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175 | * inactive chain of free partition control blocks. |
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176 | */ |
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177 | RTEMS_INLINE_ROUTINE void _Partition_Free ( |
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178 | Partition_Control *the_partition |
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179 | ) |
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180 | { |
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181 | _Objects_Free( &_Partition_Information, &the_partition->Object ); |
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182 | } |
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183 | |
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184 | RTEMS_INLINE_ROUTINE Partition_Control *_Partition_Get( |
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185 | Objects_Id id, |
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186 | ISR_lock_Context *lock_context |
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187 | ) |
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188 | { |
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189 | return (Partition_Control *) _Objects_Get( |
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190 | id, |
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191 | lock_context, |
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192 | &_Partition_Information |
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193 | ); |
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194 | } |
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195 | |
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196 | RTEMS_INLINE_ROUTINE void _Partition_Acquire_critical( |
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197 | Partition_Control *the_partition, |
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198 | ISR_lock_Context *lock_context |
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199 | ) |
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200 | { |
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201 | _ISR_lock_Acquire( &the_partition->Lock, lock_context ); |
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202 | } |
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203 | |
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204 | RTEMS_INLINE_ROUTINE void _Partition_Release( |
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205 | Partition_Control *the_partition, |
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206 | ISR_lock_Context *lock_context |
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207 | ) |
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208 | { |
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209 | _ISR_lock_Release_and_ISR_enable( &the_partition->Lock, lock_context ); |
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210 | } |
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211 | |
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212 | /**@}*/ |
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213 | |
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214 | #ifdef __cplusplus |
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215 | } |
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216 | #endif |
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217 | |
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218 | #if defined(RTEMS_MULTIPROCESSING) |
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219 | #include <rtems/rtems/partmp.h> |
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220 | #endif |
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221 | |
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222 | #endif |
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223 | /* end of include file */ |
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